Power Supply Wiring - Trane RTWB Helical-Rotary Installation Operation & Maintenance

Power supply wiring

Model RTWB chillers are designed
according to European standard
EN60204. All power-supply wiring
must be sized and selected
accordingly by the project engineer.
Water pump power supply
Provide power-supply wiring with
fused disconnect switch for both the
chilled-water and condenser-water
pumps.
Electrical panel power supply
Power supply wiring instructions for
the starter/control panel are: run line
voltage wiring in conduit to access
opening(s) on the starter/control
panel.
RTWB-SVN01B-E4
Installation Electrical
Compressor-motor phase
sequencing
Always verify that proper rotation of
the RTWB compressors is
established before the machine is
started. Proper motor rotation
requires confirmation of the
electrical phase sequence of the
power supply. The motor is
internally connected for clockwise
rotation with the incoming power
supply phased A,B,C (L1,L2,L3).
This direction may be reversed
outside the alternator by
interchanging any two of the line
wires. It is this possible interchange
of wiring that makes a phase
sequence indicator necessary if the
operator is to quickly determine the
phase rotation of the motor.
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